My suggestion on the fantastic fan was to not run the A/C in the summer if the outside temps are below 90 while out and about.
Closed up the RV is an oven. Using a fantastic fan to pull outside air across a small area like a bathroom can make it close to outside temp which a dog with water can usually deal with. As noted a portable fan might be of additional value, but close to worthless by itself.
As noted I'd want to try it and monitor temps before throwing the animal in the mix. Obviously if the temps are higher, or the fan doesn't keep it cool enough, a location with a plug makes the most sense, with generator operations running a close second.
Yes I know it can be a challenge to pull the temps down if it's been off in the heat of the day, but from 90 or less outside, mines comfortable fairly quick. In fact we've spent several weeks in 80+ weather with nothing but the fantastic fans for cooling as we dry camp a lot. Admittedly in pretty dry climates that cool off at night.
In high humidity, you really need the air.
As for heat, a good battery bank, even two batteries can do ok with the furnace set reasonably low and can be supplemented with a portable heater during waking hours.
Les
